diff --git a/app/controllers/journals_controller.rb b/app/controllers/journals_controller.rb
index 8c2f433c94..beb61a31ac 100644
--- a/app/controllers/journals_controller.rb
+++ b/app/controllers/journals_controller.rb
@@ -23,6 +23,7 @@ class JournalsController < ApplicationController
   before_action :find_optional_project, :only => [:index]
   before_action :authorize, :only => [:new, :edit, :update, :diff]
   accept_rss_auth :index
+  accept_api_auth :update
   menu_item :issues
 
   helper :issues
@@ -97,6 +98,7 @@ class JournalsController < ApplicationController
     respond_to do |format|
       format.html {redirect_to issue_path(@journal.journalized)}
       format.js
+      format.api { render_api_ok }
     end
   end
 
diff --git a/test/integration/api_test/journals_test.rb b/test/integration/api_test/journals_test.rb
new file mode 100644
index 0000000000..66fc3b4320
--- /dev/null
+++ b/test/integration/api_test/journals_test.rb
@@ -0,0 +1,95 @@
+# frozen_string_literal: true
+
+# Redmine - project management software
+# Copyright (C) 2006-2022  Jean-Philippe Lang
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+require File.expand_path('../../../test_helper', __FILE__)
+
+class Redmine::ApiTest::JournalTest < Redmine::ApiTest::Base
+  fixtures :projects, :issues, :issue_statuses, :journals, :journal_details,
+           :issue_relations, :workflows,
+           :users, :members, :member_roles, :roles, :enabled_modules,
+           :groups_users, :email_addresses,
+           :enumerations,
+           :projects_trackers, :trackers, :custom_fields
+
+  test "PUT /journals/:id.xml with valid parameters should update the journal notes" do
+    put(
+      '/journals/1.xml',
+      params: {
+        journal: { notes: 'changed notes' }
+      },
+      headers: credentials('admin')
+    )
+
+    assert_response :no_content
+    assert_equal '', @response.body
+
+    journal = Journal.find(1)
+    assert_equal 'changed notes', journal.notes
+  end
+
+  test "PUT /journals/:id.json with valid parameters should update the journal notes" do
+    put(
+      '/journals/1.json',
+      params: {
+        journal: { notes: 'changed notes' }
+      },
+      headers: credentials('admin')
+    )
+
+    assert_response :no_content
+    assert_equal '', @response.body
+
+    journal = Journal.find(1)
+    assert_equal 'changed notes', journal.notes
+  end
+
+  test "PUT /journals/:id.xml without journal details should destroy journal" do
+    journal = Journal.find(5)
+    assert_equal [], journal.details
+    assert_difference('Journal.count', -1) do
+      put(
+        "/journals/#{journal.id}.xml",
+        params: {
+          journal: { notes: '' }
+        },
+        headers: credentials('admin')
+      )
+    end
+    assert_response :no_content
+    assert_equal '', @response.body
+    assert_nil Journal.find_by(id: 5)
+  end
+
+  test "PUT /journals/:id.json without journal details should destroy journal" do
+    journal = Journal.find(5)
+    assert_equal [], journal.details
+    assert_difference('Journal.count', -1) do
+      put(
+        "/journals/#{journal.id}.json",
+        params: {
+          journal: { notes: '' }
+        },
+        headers: credentials('admin')
+      )
+    end
+    assert_response :no_content
+    assert_equal '', @response.body
+    assert_nil Journal.find_by(id: 5)
+  end
+end